SLK20S

The ZKTeco SLK20S is an enhanced embedded optical fingerprint module, upgraded from the SLK20M with larger template storage and faster comparison speeds for access control integration.
It features a Linux-based OS, 2MP CMOS sensor, and supports offline fingerprint matching with encrypted local storage.
Key Specifications
Feature
Specification 
Sensor Type
Optical CMOS, 500 dpi
Image Size
300 × 400 pixels (FAP20 compliant)
Fingerprint Capacity
8,000 templates (encrypted local storage)
Processor
Enhanced ARM9/Linux OS
Comparison Speed
4× faster than SLK20M
Communication
UART (115200bps TTL 3.3V) / USB 2.0
Power
5V USB (200mA scanning, 60mA idle)
Liveness Detection
Yes (hardware anti-spoofing)
Finger Rotation
360°
Operating Temperature
-20°C to +50°C
Dimensions
36.2 × 44.2 × 16 mm
Certifications
FBI PIV, Mobile ID FAP20, STQC